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Pointe Controller User Guide Chapter 5: Developing Controller Programs
139
Expression Syntax
In many instances, expressions can replace a single value or tag reference. Enter
expressions as free form text; they may be arithmetic or logical in nature.
All expressions produce a numeric result—either the actual result of the
arithmetic calculation, or the true/false result of a logical expression, where true
is 1 and false is 0.
An expression can include constants, tags, and functions and follows the syntax:
expression operator expression
The following table summarizes the available operators, listed in order of
precedence.
EXPRESSION TYPE OPERATORS
unary -a (negation)
multiplicative a * b (multiplication)
a / b (division)
a MOD b (modulus)
additive a + b (addition)
a - b (subtraction)
- Pointe Controller 1
- User Guide 1
- 1.2 Typical Applications 19
- 1.3 Architecture Options 20
- 1.3.3 Network Node 21
- Chapter 2: Initial Setup 24
- Chapter 3: Quickstart Project 34
- 3.1 Starting a New Project 35
- 3.2.1 Defining input bits 36
- 3.2.2 Defining output bits 38
- 3.2.3 Defining memory tags 39
- 3.6 Assigning Outputs 50
- 3.7 Adding a Time Delay 55
- 3.12 Setting Breakpoints 68
- 4.1 Safety Guidelines 73
- Orderly System Shutdown 74
- System Power Disconnect 74
- Physical (Base Unit) 76
- Environmental 76
- Electrical 76
- Communications, Ethernet 77
- Communications, Serial 77
- 4.5.1 IP Address 80
- 4.5.2 Modbus Address 84
- 4.6.1 Digital Inputs 86
- AC Inputs 87
- Digital Input Voltage 88
- I/O “Common” Terminals 88
- 4.6.2 Digital Outputs 89
- Transistor Outputs 90
- 4.6.3 Analog Inputs 91
- Resolution 92
- Accuracy 93
- Multiplexing 93
- Single Ended Inputs 93
- Differential Inputs 94
- 4.7.1 Available I/O Modules 95
- 4.8.1 Slot Numbering 98
- 4.8.2 Installing Modules 99
- 4.11.2 Cable Connectors 105
- 4.11.3 10Base-T Connections 106
- 4.11.5 Crossover Patch Cable 106
- 5.1.3 The Scan Cycle 109
- Framework Editor Tools 110
- 5.2.3 The Object Editor pane 112
- 5.2.4 The Messages pane 112
- New Project 113
- Open Project 113
- Import Project 113
- Export Project 114
- 5.4.1 Java reserved words 115
- Diagnostics Metadata 118
- Database File Format 120
- Importing a Database 122
- Exporting a Database 122
- MODULE GO TO… 130
- OL3440 Display Panel Page 291 130
- Multiple Flow Charts 131
- Program and Subcharts 131
- Flow Chart Blocks 132
- Saving a Flow Chart 133
- Deleting a Flow Chart 133
- Flow Chart Workspace 134
- Special View Pane 134
- The Flow Chart toolbar 136
- Block Properties 137
- Expression Syntax 141
- Calling Subcharts 142
- Other Build Dialogs 143
- Moving a selected block 146
- Copying a selected block 146
- Resizing a selected block 146
- Deleting a selected block 147
- A Note on Arguments 152
- Calling the Subchart 152
- 5.7.1 Process Block 153
- Process Block Example 155
- 5.7.2 Terminator Block 156
- Return/Exit Block Properties: 157
- Condition Block Example 159
- 5.7.5 While/Do Loop Block 161
- While/Do Loop Block Example 162
- 5.7.6 Subchart Block 163
- Subchart Example 164
- The Ladder Diagram toolbar 167
- Deleting elements 171
- Program Properties 171
- Rung Properties 171
- Block Captions 171
- 5.9.1 Relays and Coils 173
- 5.9.3 Math Blocks 174
- 5.9.4 Comparison Blocks 175
- 5.9.6 Selection Blocks 176
- 5.9.7 String Blocks 177
- 5.9.8 Flow Control Blocks 178
- 5.9.9 Miscellaneous Blocks 178
- 6.3.1 Unloading a project 189
- 6.4.1 Stopping a project 190
- 6.5.1 Overriding a password 193
- 7.1.1 The Charts Tab 196
- 7.1.2 The Browser Tab 197
- Showing tag details 199
- Adding tags to a watch window 199
- 7.1.3 The Console Tab 200
- Communications errors 201
- 7.1.4 The Controller Log Tab 203
- 7.2.1 Scanning 204
- 7.2.2 Loading 205
- 7.2.3 Errors 206
- 7.3.1 The Debugger Window 208
- Show Debug Trace 211
- View Debug Trace 211
- Remove All Breakpoints 212
- Display Breakpoint List 212
- Single Step 213
- 7.3.8 Forcing New Tag Values 214
- Strings and Timers 217
- 8.2.1 Modbus Address 221
- 8.2.2 Types of Modbus data 222
- Chapter 9: Troubleshooting 229
- 9.1 LED Boot Indicators 230
- 9.2 Hardware Reset 232
- Technical Specifications 234
- Connection Diagram 235
- Outputs tab 235
- Failsafe tab 236
- Ouput tab 246
- OL2205 Configuration Options 252
- Input Connections 260
- Theory of Operation 260
- Input Signal 261
- Inputs tab 263
- Channel tabs 264
- General Overview 266
- Pulse and Direction 266
- Quadrature Encoder Input 267
- Up/Down Count 267
- Z and LS Presetting 267
- Output Control 267
- Frequency Measurement 267
- Counter tab 271
- Output tabs 273
- Indicators tab 286
- Buttons tab 287
- Messages tab 292
- A.17 OL3440 Display Panel 293
- A.18 OL3850 Keypad Terminal 294
- Data Entry tab 297
- B.1 General Commands 300
- B.1.4 Clear 302
- B.1.5 Enable and Disable 302
- B.1.6 Get Tag Name 303
- B.1.7 Wait 304
- B.2 Timer Commands 305
- B.2.3 Timer Preset 306
- B.3 String Commands 308
- B.3.2 String Concat 309
- B.3.4 String Mid 311
- B.3.5 String Insert 312
- B.3.6 String Delete 313
- B.3.7 String Replace 315
- B.3.8 String Format Integer 316
- B.4 Diagnostics Commands 318
- B.4.1 Diag Get Tag Status 319
- B.4.2 Diag Set Tag Status 320
- B.4.3 Diag Clear Tag Status 321
- B.5 Serial Commands 323
- B.5.3 Serial Read Byte 326
- B.5.4 Serial Write Byte 327
- B.5.5 Serial Read MultiBytes 328
- B.5.7 Serial Get Comm Errors 330
- B.6 Date/Time Commands 332
- B.6.2 Date/Time Format 333
- B.6.3 Get Elapsed Time 334
- B.7 Operator Panel Commands 335
- C.1 Relays and Coils 340
- Functional Description 341
- Configuration Reference 341
- C.1.5 Output Coil (OC) 342
- C.1.7 Latched Coil (LOC) 343
- C.1.8 Unlatched Coil (UOC) 344
- C.2 Timer and Counter Blocks 352
- C.2.2 Timer, ON Delay (TON) 353
- C.2.3 Timer, OFF Delay (TOF) 354
- C.2.4 Counter, Up (CTU) 355
- C.2.5 Counter, Down (CTD) 357
- C.3 Math Blocks 361
- C.3.2 Subtract (SUB) 362
- C.3.3 Divide (DIV) 364
- C.3.4 Multiply (MUL) 365
- C.3.5 Square Root (SQRT) 366
- C.3.6 Modulus (MOD) 368
- C.3.7 Sine (SIN) 369
- C.3.8 Cosine (COS) 370
- C.3.9 Tangent (TAN) 371
- C.3.10 Arc Sine (ASIN) 372
- C.3.11 Arc Cosine (ACOS) 373
- C.3.12 Arc Tangent (ATAN) 374
- C.3.13 Absolute Value (ABS) 375
- C.3.14 Logarithm (LOG) 376
- C.3.16 Exponential (EXPT) 378
- C.3.18 Expression (EXPR) 381
- C.4 Comparison Blocks 383
- C.4.3 Equal to (EQ) 385
- C.4.4 Not Equal to (NE) 387
- C.4.6 Less Than (LT) 389
- C.5.1 And (AND) 391
- C.5.2 Or (OR) 393
- C.5.3 Exclusive Or (XOR) 395
- C.5.4 Not (NOT) 396
- C.5.5 Shift bits Left (SHL) 398
- C.5.6 Shift bits Right (SHR) 399
- C.5.7 Rotate bits Left (ROL) 401
- C.6 Selection Blocks 404
- C.6.3 Limit value (LIM) 407
- C.7 String Blocks 410
- C.7.7 Compare strings (CMP) 418
- C.8 Flow Control Blocks 427
- C.9 Miscellaneous Blocks 429
- C.9.5 Truncate (TRUNC) 434
- C.9.10 Move (MOVE) 440
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